Mercedes W166 Thermostat Oil Cooler Housing Hose Line Pipe Diesel A1645010265

The Oil Cooler Housing Thermostat with Hose for Mercedes W166 Diesel is a specialized component of the oil cooling system, designed for stable operation of diesel engines. By precisely regulating oil flow through the cooler, it helps maintain optimal operating temperature, which translates to engine longevity and operational safety. As part of the Thermostats and Housings group, it is a vital component for professional lubrication system repairs in Mercedes diesel vehicles.

Specifications and technical data

• SKU: A1645010265-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645010265
• Substitutable numbers: A1645010265, A 164 501 02 65
• Fuel type: Diesel
• Category: Thermostats & Housings

Purpose and Function in the Oil Cooling System

The presented oil cooler housing thermostat with hose has been developed for Mercedes vehicles with diesel engines, including the W166 series. Its function is to control the oil circulation between the engine and the oil cooler, ensuring that the oil reaches and maintains a temperature range conducive to proper lubrication and reduced wear of moving parts.

The integration of the thermostat, housing, and hose into a single assembly simplifies servicing, reduces potential leak points, and allows for a cohesive replacement of the entire system section. This solution is particularly beneficial for intensive use of diesel engines, where stable oil temperature is crucial for protecting the turbocharger and crankshaft bearings.

Benefits of Using an Original Mercedes Part

An original Mercedes component ensures a perfect fit with the factory oil cooling system geometry and compatibility with diesel engine operating parameters. The correct thermostat opening characteristics are maintained, minimizing the risk of oil overheating or prolonged operation at low temperatures.

• Factory fit for the W166 oil cooling system.
• Seamless integration with other components of the diesel engine lubrication system.
• Reduced risk of leaks due to the integrated hose.
• Stable oil operating conditions across a wide range of loads.

For the user, this means more predictable engine behavior, better component protection, and the ability to maintain near-factory performance parameters, which is especially important for vehicles operated in demanding conditions.

Component Condition and Installation Aspects

The offered oil cooler housing thermostat with hose is a used part, allowing for economical repair while maintaining original manufacturer specifications. This type of solution is often chosen for vehicles several years old, where a reasonable balance between repair cost and component quality is sought.

Due to the integrated design of the assembly, installation is straightforward – the entire system section is replaced without the need to fit multiple different parts. In practice, this simplifies the mechanic's work, reduces vehicle downtime, and minimizes the risk of installation errors, such as improper hose routing or leaky connections.

Application in Diesel Engines and Impact on Operation

In diesel engines, stable oil temperature directly impacts running smoothness, fuel consumption, and accessory durability. Using a functional oil cooler housing thermostat with hose helps to:

• maintain proper oil viscosity across a wide range of ambient temperatures,
• reduce excessive oil thinning under high loads,
• minimize the formation of carbon deposits and sludge in the lubrication system,
• increase engine resistance to prolonged high-load driving.

For the vehicle owner, this translates to more predictable operation, a lower risk of costly breakdowns, and the ability to maintain diesel engine performance close to factory levels, while keeping service costs reasonable.

Repair Extension – Mercedes Thermostats and Housings

If you are planning a comprehensive engine area repair or upgrade for your Mercedes and need other parts from the same group, such as additional thermostats, housings, or related hoses, check the available parts in the Mercedes Thermostats and Housings category.

To better plan your service budget and understand how selecting the right parts affects vehicle maintenance costs, it is worth familiarizing yourself with practical tips for economical operation – advice found in the article on cost-effective vehicle servicing using OEM parts may be particularly useful.